Java JTextComponent Action getAction(JTextComponent target, Class aClass)

Description

Searches all actions of a JTextComponent for ab action of the given class and returns the first one that matches that class, or null if no Action is found

License

Apache License

Return

Action object of that class or null

Declaration

public static <T extends Action> T getAction(JTextComponent target, Class<T> aClass) 

Method Source Code

//package com.java2s;
/*//  w  w w  .  j  av  a2  s  .  com
 * Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
 * Copyright 2011-2017 Hanns Holger Rutz.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License 
 *       at http://www.apache.org/licenses/LICENSE-2.0 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License.  
 */

import javax.swing.Action;

import javax.swing.text.JTextComponent;

public class Main {
    /**
     * Searches all actions of a JTextComponent for ab action of the given class and returns
     * the first one that matches that class, or null if no Action is found
     *
     * @return Action object of that class or null
     */
    public static <T extends Action> T getAction(JTextComponent target, Class<T> aClass) {
        for (Object k : target.getActionMap().allKeys()) {
            Action a = target.getActionMap().get(k);
            if (aClass.isInstance(a)) {
                @SuppressWarnings("unchecked")
                T t = (T) a;
                return t;
            }
        }
        return null;
    }
}

Related

1. getAction(JTextComponent component, String actionName)
2. setHistoryActions(JTextComponent textComponent)